IN THE SOLID AND LIQI'ID PHASES.— JOHNSTONE 



199 



^Measurements of the resistance of sample I were made at 

 different temperatures ranging from 7°C. to the melting point. 

 It was found possible to supercool to temperatures as low as 

 0°C with comparative ease, so measurements were made in 

 the liquid phase at temperatures ranging from 25°C to 0°C. 



TABLE 2. 



Sample 1. 



= CeU Constant 0.166 = M. P. 1.5.9° C. 



Temp. 



State. Sp. Resistance. 







-.rC. 1 



Solid i 



+ .6.0 ' 



1 



8.0 



'• 1 



9..5 



" 1 



10.. 5 



" 



12.0 



u 



12.9 





14.0 



11 ' 



15. 



" i 



15.0 



u 



15.9 



l( 



16.0 



Liquefying 



15.9 



'•. 



17.2 



(1 



16.0 



" 



16.5 



" 



18.0 



'' 



27.0 



Liquid 



24.9 



'• 



23. 



" 



20.9 



" 



18.9 



u 



14.8 



(( 



13.0 



(( 



10.0 



" 



7.3 



•' 



-80°C. 



SoUd 



7.48X10" 



7.95X10- 



9.25X10= 



1.10X10^ 



1.27X10' 



1.66X10' 



2.01X10' 



2.48X10' 



2.76X10' 



2.79X10' 



2.95X10' 



2.91X10' 



2.62X10' 



2.29X10' 



1.53X10' 



1.37X10' 



1.23X10' 



7.48X10' 



8.24X10' 



8.83X10' 



9.72X10' 



1.05X10' 



1.27X10' 



1.39X10' 



1.61X10' 



1.85X10' 



1.02X10'= 



In table 2 are given values of the specific resistance for 

 sample I, in the liquid and solid phases at temperatures 

 ranging from 27°C to — 7°C. Curve 1 shows how the specific 

 resistance in each phase varies with the temperature. Starting 

 at the point, c, on curve 1, the resistance at first decreases 

 very slowly with rising temperature, then it begins to in- 



